1*f3087befSAndrew Turner /*
2*f3087befSAndrew Turner * Double-precision vector sincos function.
3*f3087befSAndrew Turner *
4*f3087befSAndrew Turner * Copyright (c) 2023-2024, Arm Limited.
5*f3087befSAndrew Turner * SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception
6*f3087befSAndrew Turner */
7*f3087befSAndrew Turner
8*f3087befSAndrew Turner /* Define _GNU_SOURCE in order to include sincos declaration. If building
9*f3087befSAndrew Turner pre-GLIBC 2.1, or on a non-GNU conforming system, this routine will need to
10*f3087befSAndrew Turner be linked against the scalar sincosf from math/. */
11*f3087befSAndrew Turner #define _GNU_SOURCE
12*f3087befSAndrew Turner #include <math.h>
13*f3087befSAndrew Turner
14*f3087befSAndrew Turner #include "v_math.h"
15*f3087befSAndrew Turner #include "test_defs.h"
16*f3087befSAndrew Turner #include "v_sincos_common.h"
17*f3087befSAndrew Turner
18*f3087befSAndrew Turner /* sincos not available for all scalar libm implementations. */
19*f3087befSAndrew Turner #if defined(_MSC_VER) || !defined(__GLIBC__)
20*f3087befSAndrew Turner static void
sincos(double x,double * out_sin,double * out_cos)21*f3087befSAndrew Turner sincos (double x, double *out_sin, double *out_cos)
22*f3087befSAndrew Turner {
23*f3087befSAndrew Turner *out_sin = sin (x);
24*f3087befSAndrew Turner *out_cos = cos (x);
25*f3087befSAndrew Turner }
26*f3087befSAndrew Turner #endif
27*f3087befSAndrew Turner
28*f3087befSAndrew Turner static void VPCS_ATTR NOINLINE
special_case(float64x2_t x,uint64x2_t special,double * out_sin,double * out_cos)29*f3087befSAndrew Turner special_case (float64x2_t x, uint64x2_t special, double *out_sin,
30*f3087befSAndrew Turner double *out_cos)
31*f3087befSAndrew Turner {
32*f3087befSAndrew Turner if (special[0])
33*f3087befSAndrew Turner sincos (x[0], out_sin, out_cos);
34*f3087befSAndrew Turner if (special[1])
35*f3087befSAndrew Turner sincos (x[1], out_sin + 1, out_cos + 1);
36*f3087befSAndrew Turner }
37*f3087befSAndrew Turner
38*f3087befSAndrew Turner /* Double-precision vector function allowing calculation of both sin and cos in
39*f3087befSAndrew Turner one function call, using shared argument reduction and separate polynomials.
40*f3087befSAndrew Turner Largest observed error is for sin, 3.22 ULP:
41*f3087befSAndrew Turner v_sincos_sin (0x1.d70eef40f39b1p+12) got -0x1.ffe9537d5dbb7p-3
42*f3087befSAndrew Turner want -0x1.ffe9537d5dbb4p-3. */
43*f3087befSAndrew Turner VPCS_ATTR void
_ZGVnN2vl8l8_sincos(float64x2_t x,double * out_sin,double * out_cos)44*f3087befSAndrew Turner _ZGVnN2vl8l8_sincos (float64x2_t x, double *out_sin, double *out_cos)
45*f3087befSAndrew Turner {
46*f3087befSAndrew Turner const struct v_sincos_data *d = ptr_barrier (&v_sincos_data);
47*f3087befSAndrew Turner uint64x2_t special = check_ge_rangeval (x, d);
48*f3087befSAndrew Turner
49*f3087befSAndrew Turner float64x2x2_t sc = v_sincos_inline (x, d);
50*f3087befSAndrew Turner
51*f3087befSAndrew Turner vst1q_f64 (out_sin, sc.val[0]);
52*f3087befSAndrew Turner vst1q_f64 (out_cos, sc.val[1]);
53*f3087befSAndrew Turner
54*f3087befSAndrew Turner if (unlikely (v_any_u64 (special)))
55*f3087befSAndrew Turner special_case (x, special, out_sin, out_cos);
56*f3087befSAndrew Turner }
57*f3087befSAndrew Turner
58*f3087befSAndrew Turner TEST_DISABLE_FENV (_ZGVnN2v_sincos_cos)
59*f3087befSAndrew Turner TEST_DISABLE_FENV (_ZGVnN2v_sincos_sin)
60*f3087befSAndrew Turner TEST_ULP (_ZGVnN2v_sincos_sin, 2.73)
61*f3087befSAndrew Turner TEST_ULP (_ZGVnN2v_sincos_cos, 2.73)
62*f3087befSAndrew Turner #define V_SINCOS_INTERVAL(lo, hi, n) \
63*f3087befSAndrew Turner TEST_INTERVAL (_ZGVnN2v_sincos_sin, lo, hi, n) \
64*f3087befSAndrew Turner TEST_INTERVAL (_ZGVnN2v_sincos_cos, lo, hi, n)
65*f3087befSAndrew Turner V_SINCOS_INTERVAL (0, 0x1p-31, 50000)
66*f3087befSAndrew Turner V_SINCOS_INTERVAL (0x1p-31, 0x1p23, 500000)
67*f3087befSAndrew Turner V_SINCOS_INTERVAL (0x1p23, inf, 10000)
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